I am about to order the switch grip kit from Buddie's and was wondering if you can use a vent hole with it? I have never seen that topic come up, but i love using a vent hole and was wondering if anyone has done this with a switch grip setup. Any info is greatly appreciated.

One of the pro shops here in town uses vent holes in his Switch Grips.  If you use the thumb hole tight enough, you can get a vacuum.  I would have to check and see where the vent hole comes out in the bottom of the thumb.

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Storm
Brunswick

switch grips are just like a slug except for the gap that might be between the inner and outer sleeve. So with a tight enough hole there most definitely will be a vacuum effect.

dont see why a knowledgable driller couldnt just drill a vent hole. but i think it MIGHT have to be drilled thru the ball at an angle. not sure if it would be safe to drill thru the slug.
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tournament average: 219

tweener
medium revs
medium speed
specs and ball layouts in profile

currently throwing
Visionary (O.P. / O. SS. / Glad S.)
Rotogrip (rogue cell)
lanemasters (black pearl)